Wow that link has been super informative, thank you! I knew that the transmission risk was actually lower than commonly thought but wasn't aware that it was direction- and sexual act-dependent, nor that condoms were of great but still limited effect. Thanks!
In fact, receptive penio-anal sex has about 17 times as high a transmission rate than receptive penio-vaginal sex, which an order of magnitude more difference than what a condom can make in either.
The difference a condom makes is quite comparable to being the receiver or penetrator in penio-vaginal sex, in fact.
